Preparation method and application of a single lithium ion conductive fluorine-containing polymer solid-state electrolyte

Abstract

The application belongs to the technical field of lithium ion batteries, and particularly relates to a preparation method of a single lithium ion conductive fluorine-containing polymer solid-state electrolyte and application thereof. The application adopts a controllable free radical polymerization method, takes fluorine-containing lithium salt monomers and vinyl ether derivatives as comonomers, realizes alternating copolymerization of the two types of monomers through heating or light irradiation, the vinyl ether monomers can be connected with polyethylene glycol segments of different lengths, and thus a polymer with uniform arrangement of lithium ion groups and polyethylene glycol segments is prepared. The polymer electrolyte can be directly packaged with a positive electrode sheet and a negative electrode sheet to form a solid-state battery, and results show that under the driving of the uniformly distributed ethoxy groups, lithium ions can realize continuous hopping transmission on the polymer chain. The single lithium ion conductive fluorine-containing polymer solid-state electrolyte obtained by the method has good high-pressure resistance, room temperature conductivity, lithium ion transference number and interface compatibility with lithium metal.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of lithium ion batteries, and particularly relates to a preparation method of a single lithium ion conductive fluorine-containing polymer solid-state electrolyte and application thereof. BACKGROUND

[0002] Lithium has an extremely low electrochemical potential, thereby promoting the wide application of lithium ion batteries in the fields of power, energy and electric power. The electrolyte of a conventional lithium ion battery is composed of an electrolyte wetting a separator, and problems such as current short circuit and local heating are prone to occur during use, and even a series of safety problems such as combustion and explosion can be caused. The solid-state battery has the characteristics of high energy density and high safety, and has become the research target of the next generation of high-performance lithium ion batteries, and the solid-state electrolyte therein has become a hot research field. Although the inorganic solid-state electrolyte mainly composed of sulfur / oxide has a high conductivity, its poor flexibility greatly increases the interfacial resistance, and the interface contact is insufficient and difficult to process; for the polymer solid-state electrolyte typified by polyethylene glycol (PEG), although the interface performance is greatly improved, the strong coordination of oxygen atoms on the molecular chain to lithium ions and the strong crystallinity of PEG result in a low conductivity of the electrolyte, a low contribution of lithium ion transmission to the current (low lithium transference number), and such PEG host material is not resistant to high pressure. Therefore, it is necessary to further precisely adjust the polymer structure to achieve a breakthrough in the comprehensive performance of the polymer electrolyte.

[0003] The traditional polymer electrolyte system is usually a physical mixture of a polymer and a lithium salt small molecule, and the transmission is performed by the dissociated lithium ions. In such a mixed system, the anions and cations can move freely, so the current contribution in the battery includes the current provided by the anion movement and the lithium ion movement, and the proportion of the current provided by the lithium ion in the total current is usually defined as the lithium transference number. However, a low lithium transference number will cause lithium ion concentration polarization of the electrolyte, thereby exacerbating the growth of lithium dendrites, and finally causing the battery to short circuit. In order to solve this problem, in recent years, the concept of single lithium ion conductive polymer has been proposed, which is to fix the anion on the polymer main chain, and to realize single conduction of only lithium ions in the electrolyte system by using the low chain movement of the polyanion, thereby greatly improving the lithium transference number. However, such single lithium ion conductive polymer usually has a low conductivity due to the lack of current contribution provided by the anion movement, and it is difficult to realize daily application at room temperature.

[0004] Therefore, how to improve the electrochemical stability of the polymer electrolyte to expand the electrochemical application window has become a technical problem to be solved. SUMMARY

[0005] Therefore, the first object of the present application is to provide a single lithium ion conductive fluorine-containing polymer solid electrolyte to solve the problems in the prior art.

[0006] To achieve the above object, the present application adopts the following technical solution:

[0007] A single lithium ion conductive fluorine-containing polymer solid electrolyte has a unit structure formula shown in formula (1):

[0008]

[0009] wherein, R 1 is methyl, trifluoromethyl, phenyl, p-trifluoromethyl phenyl or p-methoxy phenyl, R 2 is a perfluoroether chain with a carbon unit number of 1-10, R 3 , R 4 is a fluorine atom or a trifluoromethyl group, R 5 is a fluorine atom, a trifluoromethyl group, a pentafluoroethyl group or a heptafluoropropyl group, R 6 is a methyl group or a crown ether group with an atomic number of 12-24; n is a positive integer, and 1≤n≤25; m is a positive integer, and 10≤m≤100.

[0010] Considering that fluorine atoms are the most electronegative elements in the periodic table, have a low polarizability and a super-high C-F bond energy, the fluorine-containing polymer has a series of excellent properties such as corrosion resistance, oxidation resistance, difficult to burn, hydrophobic and oleophobic, high stability and the like. Therefore, by introducing fluorine elements into the polymer electrolyte through structural design, the electrochemical stability of the polymer electrolyte is greatly improved, and the electrochemical application window is widened.

[0011] In addition, the uniformly distributed PEG segments disclosed in the present application can promote the dissociation of lithium ions from adjacent anions through coordination, realize the continuous jumping transmission of lithium ions on the polymer chain, and greatly improve the polymer conductivity; at the same time, the introduction of high electronegative fluorine elements greatly improves the dissociation ability of anions and makes up for the low electrochemical stability of PEG polymer electrolyte.

[0012] The second object of the present application is to provide a preparation method of the single lithium ion conductive fluorine-containing polymer solid electrolyte as described above.

[0013] To achieve the above object, the present application adopts the following technical solution:

[0014] The preparation method of the single lithium ion conductive fluorine-containing polymer solid electrolyte as described above is based on the free radical alternating copolymerization reaction of fluorine-containing lithium salt monomers and vinyl ether monomers.

[0015] Preferably, the fluorine-containing lithium salt monomer has a structure as shown in formula (2) or (3), and the vinyl ether monomer has a structure as shown in formula (4):

[0016]

[0017] wherein R 1 is methyl, trifluoromethyl, phenyl, p-trifluoromethyl phenyl or p-methoxy phenyl, R 2 is a perfluoroether chain with a carbon unit number of 1-10, R 3 is a fluorine atom or trifluoromethyl, R 4 is a fluorine atom or trifluoromethyl, R 5 is a fluorine atom, trifluoromethyl, pentafluoroethyl or heptafluoropropyl, R 6 is methyl or a crown ether group with an atom number of 12-24, and the repeating unit n is a positive integer of 1-25.

[0018] Preferably, the preparation step comprises:

[0019] (1) preparing a reaction solution: mixing the reactants uniformly and removing oxygen in the reaction system; the reactants include the fluorine-containing lithium salt monomer, the vinyl ether monomer, the initiator and the solvent, and the molar ratio of the fluorine-containing lithium salt monomer to the vinyl ether monomer is 10:3-30, and the molar ratio of the fluorine-containing lithium salt monomer to the initiator is 1000:1-100;

[0020] (2) placing the reaction solution in a container and performing the reaction under stirring;

[0021] (3) after the reaction is completed, precipitating and purifying the reaction solution, and drying in a vacuum drying oven at 60-100°C for 2-24 hours to obtain the single lithium ion conductive fluorine-containing polymer solid electrolyte.

[0022] Further preferably, the initiator is one or more of azo compounds, peroxides, trithio esters, perfluoroalkyl halides and alkyl halides; and the solvent is one or more of dimethyl sulfoxide, N,N-dimethylformamide, carbonic acid ester, N-methyl pyrrolidone, acetonitrile and acetone.

[0023] Further preferably, the step (2) is heating the reaction under stirring for 1-48 hours, and the heating temperature is 40-120°C.

[0024] Further preferably, the reactants further include a photo catalyst, and the molar ratio of the photo catalyst to the fluorine-containing lithium salt monomer is 0.001-1 mol%.

[0025] Further more preferably, the photo catalyst is one or more of organic small molecule photosensitizer compounds with a skeleton of porphyrin, dihydrophenazine, phenothiazine and phenoxazine. Further more preferably, the photo catalyst is one or more of organic small molecule photosensitizer compounds with a skeleton of porphyrin, dihydrophenazine, phenothiazine and phenoxazine.

[0026] It is worth mentioning that the photocatalyst is one or more of zinc porphyrin, tris(2-phenylpyridine) iridium, 10-phenylphenothiazine.

[0027] More preferably, the step (2) is reacted for 1-40 hours under light irradiation, and the light irradiation reaction uses a light source with an emission wavelength of 350-700 nm.

[0028] A third object of the present application is to provide an application of the single lithium ion conductive fluorine-containing polymer solid-state electrolyte as described above.

[0029] The application of the single lithium ion conductive fluorine-containing polymer solid-state electrolyte in the preparation of a solid-state lithium ion battery.

[0030] In order to completely disclose the technical solutions involved in the present application, a preparation method for preparing a solid-state lithium ion battery is disclosed, but this disclosure should not be regarded as a limitation on the application of the single lithium ion conductive fluorine-containing polymer solid-state electrolyte in the preparation of a solid-state lithium ion battery. All preparation methods using the single lithium ion conductive fluorine-containing polymer solid-state electrolyte belong to the protection scope of the present application.

[0031] A preparation method of a solid-state lithium ion battery, comprising the following steps:

[0032] The polymer solid-state electrolyte as described above is assembled between the positive electrode sheet and the negative electrode sheet, and after the welding of the tab, heat treatment and packaging treatment, a solid-state lithium ion battery is obtained. The lithium ion battery electrode sheet preparation and battery tab welding, heat treatment and packaging processes involved in the above steps belong to the conventional test means in the art.

[0033] Preferably, the active material in the positive electrode sheet is one or more of lithium iron phosphate, nickel cobalt manganese, lithium manganate, lithium titanate, lithium cobaltate ternary battery material; and the active material in the negative electrode sheet is one or more of a combination of metal lithium, graphene, carbon material, nitride, boron-based material, silicon-based material and phosphide.

[0034] The present application discloses a single lithium ion conductive fluorine-containing polymer solid-state electrolyte, which is prepared by using a fluorine-containing lithium salt monomer and a vinyl ether with different length PEG as a comonomer, and realizing the alternating copolymerization of the two types of monomers by heating or light irradiation. The uniformly distributed PEG segments can promote the dissociation of lithium ions from adjacent anions through coordination, realize continuous jump transmission on the polymer chain, and greatly improve the polymer conductivity. At the same time, the introduction of high electronegativity fluorine element greatly improves the dissociation ability of anion, and makes up for the low electrochemical stability of PEG polymer electrolyte. The single lithium ion conductive fluorine-containing polymer solid-state electrolyte obtained by the method has good high pressure resistance, room temperature conductivity, lithium ion transference number and interface compatibility with lithium metal. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0036] Figure 1 This is the monomer synthesis route of Example 1.

[0037] Figure 2 This is the monomer synthesis route of Example 2.

[0038] Figure 3 This is the polymer synthesis route of Example 3.

[0039] Figure 4 This is the polymer synthesis route of Example 4.

[0040] Figure 5 This is the current-time curve of the solid-state battery of Application Example 1.

[0041] Figure 6 This is the electrochemical impedance spectrum of the solid-state battery of Application Example 1.

[0042] Figure 7 The relationship curve between lithium stripping / deposition and cycle time of solid-state battery in application example 3 at 30°C is shown in FIG.

[0043] Figure 8 Electrochemical impedance spectroscopy of the solid-state battery of Application Example 3 before and after lithium stripping / deposition cycles.

[0044] Figure 9 The polyethylene glycol vinyl ether prepared in Example 2 1 H NMR spectrum.

[0045] Figure 10 The monomer units of the poly(perfluoro(4-methyl-3,6-dioxa-7-octene)-trifluoromethanesulfonyl imide lithium-polyethylene glycol vinyl ether) copolymer prepared in Example 4 are 1 H NMR spectrum.

[0046] Figure 11 Schematic diagram of the structure of the single lithium ion conductive fluorine-containing polymer solid electrolyte of the present invention. DETAILED DESCRIPTION

[0047] The following is a clear and complete description of the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0048] The term "embodiment" is used herein specifically to describe any embodiment as "exemplary," and should not be construed as superior or preferable to other embodiments. Performance indicators in the embodiments of this application were tested using conventional testing methods in the art, unless otherwise specified. It should be understood that the terms used in this application are intended solely to describe specific implementations and are not intended to limit the disclosure herein.

[0049] Unless otherwise specified, the technical and scientific terms used herein have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs; other experimental methods and technical means not specifically specified in this application refer to experimental methods and technical means commonly used by ordinary technicians in this field.

[0050] In order to better illustrate the content of this application, numerous specific details are provided in the specific examples below. It should be understood by those skilled in the art that this application can be implemented without certain specific details. In the examples, some methods, means, instruments, equipment, etc. well known to those skilled in the art are not described in detail in order to highlight the main purpose of this application.

[0051] Under the premise of no conflict, the technical features disclosed in the embodiments of this application can be combined arbitrarily, and the resulting technical solutions belong to the contents disclosed in the embodiments of this application.

[0052] The present invention develops a single lithium ion conductive fluorinated polymer solid electrolyte ( Figure 11 ), the evenly distributed PEG segments can promote the dissociation of lithium ions from adjacent anions through coordination, thereby realizing continuous hopping transmission of lithium ions on the polymer chain. The single lithium ion conductive fluorinated polymer solid electrolyte obtained by the method of the present invention has good high voltage resistance, room temperature conductivity, lithium ion transference number and interface compatibility with lithium metal.

[0053] In order to better understand the present invention, the present invention is further specifically described through the following examples, but it should not be understood as limiting the present invention. Some non-essential improvements and adjustments made by those skilled in the art based on the above invention content are also considered to fall within the scope of protection of the present invention.

[0054] Part I: Synthesis of comonomers for single-ion conducting polymers

[0055] Example 1

[0056] Trifluoromethylsulfonamide, triethylamine, and dichloromethane were added to a round-bottom flask with a stirrer. A dichloromethane solution of 2-(trifluoromethyl)perfluoroacryloyl chloride was then injected into the mixture, and the mixture was stirred and reacted overnight. After the reaction, the dichloromethane was removed by rotary evaporation, and acetonitrile and lithium tert-butoxide were added. The reaction was allowed to proceed at room temperature for 12 hours, and the solvent was then removed by rotary evaporation. The crude product was purified by column chromatography to obtain a pale yellow viscous solid, lithium 2-(trifluoromethyl)-N-(trifluoromethanesulfonyl)-2-perfluoroacrylamide. Figure 1 This is the monomer synthesis route of Example 1.

[0057] Example 2

[0058] Polyethylene glycol monomethyl ether (average molecular weight 350 g / mol, repeating units n=8), sodium hydride, and tetrahydrofuran solvent were added to a round-bottom flask equipped with a stirrer and stirred for 1 hour. A solution of 2-(vinyloxy)-4-methylbenzenesulfonate in tetrahydrofuran was then injected into the mixture, and the mixture was stirred overnight at room temperature. After the reaction, the tetrahydrofuran was removed by rotary evaporation, and the crude product was purified by column chromatography to obtain a colorless, transparent liquid of polyethylene glycol vinyl ether. Figure 2 This is the monomer synthesis route of Example 2. Figure 9 Polyethylene glycol vinyl ether 1 H NMR spectrum.

[0059] Part II: Synthesis of poly(fluorinated lithium salt-vinyl ether) copolymers

[0060] Example 3

[0061] Preparation of poly(2-(trifluoromethyl)-N-(trifluoromethanesulfonyl)-2-acrylamide lithium-polyethylene glycol vinyl ether) copolymer by heating:

[0062] A monomer solution was prepared by dissolving lithium 2-(trifluoromethyl)-N-(trifluoromethanesulfonyl)-2-perfluoroacrylamide in anhydrous acetonitrile at a molar ratio of 10:3, wherein the amount of polyethylene glycol vinyl ether (repeating unit n=13) was 2 mmol. Then, the prepared monomer solution was mixed with 2×10 -2 mmol of azobisisobutyronitrile was added to a Schlenk bottle equipped with a magnet, dissolved and stirred evenly to degas and deoxygenate the reaction mixture, and then the reaction bottle was placed in a 70°C oil bath for 24 hours. 1 The monomer conversion rate was 95% as measured by HNMR. After removing the acetonitrile by rotary evaporation, the product was transferred to a vacuum drying oven at 70°C and dried to constant weight to obtain a yellow-brown sticky solid. The polymer molecular weight M was measured by GPC. n =2.58×10 4 g / mol. Figure 3This is the polymer synthesis route of Example 3.

[0063] Example 4

[0064] Preparation of poly(perfluoro(4-methyl-3,6-dioxa-7-octene)-trifluoromethanesulfonyl imide lithium-polyethylene glycol vinyl ether) copolymer by photoirradiation:

[0065] A monomer solution was prepared by dissolving lithium perfluoro(4-methyl-3,6-dioxa-7-octene)-trifluoromethanesulfonyl imide: polyethylene glycol vinyl ether in 4 mL of anhydrous diethyl carbonate at a molar ratio of 1:3, wherein the polyethylene glycol vinyl ether (repeating unit n=8) was 2 mmol. Then, the prepared monomer solution and 2×10 -2 mmol of ethyl 2-(ethoxythioxomethyl)propionate and 1×10 -3 mmol of 10-phenylphenothiazine was added to a Schlenk flask equipped with a magnet, dissolved and stirred evenly to degas and deoxygenate the reaction mixture, and then the reaction system was placed under 13W white LED light for 24 hours. 1 The monomer conversion rate was 97% as measured by HNMR. The sample was precipitated with toluene three times and then transferred to a vacuum drying oven at 70°C and dried to constant weight to obtain a light yellow sticky solid. The polymer molecular weight M was measured by GPC. n =3.24×10 4 g / mol. Figure 4 This is the polymer synthesis route of Example 4. Figure 10 The monomer units of the copolymer are poly(perfluoro(4-methyl-3,6-dioxa-7-octene)-trifluoromethanesulfonyl imide lithium-polyethylene glycol vinyl ether) 1 H NMR spectrum.

[0066] Part III: Synthesis of Polyethylene Glycol Polymer Solid Electrolyte

[0067] Comparative Example 1:

[0068] 1g of polyethylene glycol (molecular weight 2×10 4 g / mol) and 0.5 g of lithium bis(trifluoromethylsulfonyl)imide (LiTFSI) were dissolved in 10 mL of anhydrous acetonitrile and stirred under a dry nitrogen atmosphere for 4 h. After removing the acetonitrile by rotary evaporation, the product was transferred to a vacuum drying oven at 70 °C and dried to constant weight to obtain a white solid.

[0069] Part 4: Assembling solid electrolytes into solid-state batteries and measuring electrochemical performance

[0070] Application Example 1

[0071] The single-ion conducting polymer electrolyte obtained in Example 3 was assembled between two pieces of metal lithium electrode to obtain a symmetric lithium metal solid-state battery. After welding of the tab, heat treatment and packaging, a solid-state battery was obtained. The lithium transference number was 0.93 and the conductivity was 2.2 x 10 -5 S / cm at room temperature by using an electrochemical workstation CHI760E. Figure 5 The current-time curve of the solid-state battery of Application Example 1 is shown in Figure 6 The electrochemical impedance spectrogram of the solid-state battery of Application Example 1 is shown in

[0072] Application Example 2:

[0073] The polymer electrolytes obtained in Example 3, Example 4 and Comparative Example 1 were assembled into lithium metal solid-state batteries. After welding of the tab, heat treatment and packaging, a solid-state battery was obtained. The conductivity and electrochemical window of the battery were tested at room temperature by using an electrochemical workstation CHI760E. The results are shown in Table 1.

[0074] Table 1

[0075] Serial number Room temperature ionic conductivity (S / cm) Electrochemical window (V) Comparative Example 1 2.5 x 10 -4 ]]> 4.8 Example 3 2.2 x 10 -5 ]]> 5.4 Example 4 5.8 x 10 -4 ]]> 5.6

[0076] Application Example 3:

[0077] The single-ion conducting polymer electrolyte obtained in Example 4 was assembled between two pieces of metal lithium electrode to prepare a solid-state battery cell. After welding of the tab, heat treatment and packaging, a solid-state battery was obtained. The lithium stripping / deposition cycling test of the battery was carried out at 30°C by using a blue electric test system at a current density of 0.05 mA / cm 2 . Figure 7 The relationship curve between lithium stripping / deposition and cycle time of the solid-state battery of Application Example 3 at 30°C is shown in Figure 8 The electrochemical impedance spectrograms of the solid-state battery of Application Example 3 before and after lithium stripping / deposition cycling are shown in

[0078] The above description of disclosed embodiments enables one of ordinary skill in the art to make and use the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A single lithium ion conductive fluorinated polymer solid electrolyte, characterized in that: It has the unit structure shown in formula (1): Among them, R 1 is methyl, trifluoromethyl, phenyl, p-trifluoromethylphenyl or p-methoxyphenyl, R 2 is a perfluoroether chain with 1 to 10 carbon units, R 3 , R 4 is a fluorine atom or a trifluoromethyl group, R 5 is a fluorine atom, a trifluoromethyl group, a pentafluoroethyl group or a heptafluoropropyl group, R 6 is a methyl group or a crown ether group having 12 to 24 atoms; n is a positive integer, and 1≤n≤25; m is a positive integer, and 10≤m≤100.

2. A method for preparing a single lithium ion conductive fluorinated polymer solid electrolyte according to claim 1, characterized in that: It is based on the free radical alternating copolymerization of fluorinated lithium salt monomers and vinyl ether monomers.

3. The preparation method according to claim 2, characterized in that The structural formula of the fluorine-containing lithium salt monomer is shown in formula (2) or (3), and the structural formula of the vinyl ether monomer is shown in formula (4): Among them, R 1 is methyl, trifluoromethyl, phenyl, p-trifluoromethylphenyl or p-methoxyphenyl, R 2 is a perfluoroether chain with 1 to 10 carbon units, R 3 , R 4 is a fluorine atom or a trifluoromethyl group, R 5 is a fluorine atom, a trifluoromethyl group, a pentafluoroethyl group or a heptafluoropropyl group, R 6 It is a methyl group or a crown ether group with 12 to 24 atoms, and the repeating unit n is a positive integer of 1 to 25.

4. The preparation method according to claim 3, characterized in that The preparation steps include: (1) preparing a reaction solution: uniformly mixing reactants and removing oxygen from the reaction system; the reactants include a fluorine-containing lithium salt monomer, a vinyl ether monomer, an initiator, and a solvent, and the molar ratio of the fluorine-containing lithium salt monomer to the vinyl ether monomer is 10:(3-30); and the fluorine-containing lithium salt monomer to the initiator is 1000:(1-100); (2) placing the reaction solution in a container and reacting under stirring conditions; (3) After the reaction is completed, the reaction solution is precipitated, purified, and dried in a vacuum drying oven at 60-100° C. for 2-24 hours to obtain the single lithium ion conductive fluorinated polymer solid electrolyte.

5. The preparation method according to claim 4, characterized in that The initiator is one or more of azo compounds, peroxides, trithioesters, perfluoroalkyl halides, and alkyl halides; the solvent is one or more of dimethyl sulfoxide, N,N-dimethylformamide, carbonate, N-methylpyrrolidone, acetonitrile, and acetone.

6. The preparation method according to claim 4, characterized in that The step (2) is to heat the reaction for 1 to 48 hours under stirring conditions, and the heating temperature is 40 to 120°C.

7. The preparation method according to claim 5, characterized in that The reactants further include a photocatalyst, and in terms of molar ratio, the photocatalyst is 0.001 to 1 mol% of the fluorine-containing lithium salt monomer.

8. The preparation method according to claim 7, characterized in that The photocatalyst is one or more organic small molecule photosensitizer compounds with porphyrin, dihydrophenazine, phenothiazine and phenoxazine as the skeleton.

9. The preparation method according to claim 8, characterized in that The step (2) is to react under light for 1 to 40 hours, and the light reaction uses a light source with an emission wavelength of 350 to 700 nm.

10. A use of the single lithium ion conductive fluorinated polymer solid electrolyte according to claim 1, characterized in that: Application of the single lithium ion conductive fluorinated polymer solid electrolyte in the preparation of solid-state lithium ion batteries.

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